Healing from trauma? Depends on the person. I'll just share what worked for me since I've had plenty of trauma in life (bad abusive parents, being bullied and outcast in school, compulsory military in my country).
The more I detached from my ego, the less pain and suffering I felt. Ego loves trauma. It feeds on it. Whether your ego identifies as superior or inferior to everyone, the result is the same.
That's basically the short boil down answer. Ego is your enemy. Detach from it.
And to test it, expose yourself to your "triggers". In my case, it's my parents and watching "normies" seemingly fit in and have no problems. With my parents, I have to be really conscious. Need to have prayed or fasted or meditated before visiting them or else I'm guaranteed to lose my temper.
For "normies", it's all smooth sailing now. Used to mentally go into a depressive fit triggered by jealousy "man life is so unfair why didn't I have a normal social life AHHHHHH
"
To help the detachment, here's some simple science...
Physics says we are made of atoms. Atoms are made of energy. We're not really "solid" because of space between atoms. Or... We are only "solid" because of the way the electrons spin around... Or some complicated scientific explanation I can't understand or articulate because I'm not very good in physics.
Matter turns into energy. Burn gasoline. Burn firewood. So if we are matter and we eventually dissolve, what are we anyway?
And... If you're more religious minded, "in the beginning was the word and the word was with God and the word was God". Word = vibration = energy. "The grass withers, the flower fades, the word of the Lord is forever". Energy can't be created or destroyed.
Science and religion can make sense. They don't have to fight each other.